Microstructure and magnetoresistance in La0.67Ca0.33Mn1-xVxO3 (x=0, 0.03, 0.06, 0.1, 0.15 and 0.25) compound

被引：32
|
作者：
Gencer, H. [1 ]
Kolat, V. S. [1 ]
Atalay, S. [1 ]
机构：
[1] Inonu Univ, Sci & Arts Fac, Dept Phys, Malatya, Turkey
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2006年 / 422卷 / 1-2期
关键词：
manganites; V substitution; colossal magnetoresistance;
D O I：
10.1016/j.jallcom.2005.12.005
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The microstructure and magnetoresistance properties of the polycrystalline La0.67Ca0.3Mn1-xVxO3 were systematically investigated as a function of V-doping level. X-ray powder diffraction indicated that the substitution of Mn by V produced no structural change and only the diffraction lines for cubic perovskite were obtained for all samples. The detailed EDX analysis showed the existence of two phases in La0.67Ca0.3Mn1-xVxO3 (x = 0.03, 0.06, 0.1, 0.15 and 0.25) samples. The temperature dependence of resistance showed two maxima in the V-doped sample for x <= 0.15, and the peak value of magnetoresistance (MR) around insulator-metal transition temperature was increased with V-doping. Double maxima in the resistance-temperature curves were explained by the existence of two phases in La0.67Ca0.3Mn1-xVxO3 samples. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：40 / 45
页数：6
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